# InterFasting vs Time to fast!

The clearest difference is in-app purchases: Time to fast! at none against InterFasting's 3. Time to fast! also leads on ads (none vs shown). InterFasting's advantage is review sentiment (88% vs 71%) and device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. InterFasting sells 3 in-app purchases, starting at $3.99 per month. Time to fast! asks for nothing beyond the download.

InterFasting ships an update every 2 days, Time to fast! every 3 days. The most recent releases landed on September 22, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | InterFasting | Time to fast! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (267 ratings)](https://appshunter.io/ios/app/interfasting-fasting-timer/id1467464443/reviews)** | — |
| Number of ratings | **267** | — |
| Positive reviews | **88.4% of reviews** | 71.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 85 MB | 13 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kim Yunhoo](https://appshunter.io/developer/1464827169) | [Eunbee Kang](https://appshunter.io/developer/1640984912) |

## What reviewers say

### InterFasting

[App page](https://appshunter.io/ios/app/interfasting-fasting-timer/id1467464443)

This app helps users succeed with intermittent fasting through scientific and systematic management. It offers AI-powered schedule and calorie recommendations, a simple timer, and comprehensive tracking of fasting hours, meals, workouts, and water intake. Users can visualize progress and receive detailed reports to build healthy habits.

**Highlights:** AI fasting schedule recommendations, AI food calorie calculation, Intermittent fasting timer, Customizable fasting plans, All-in-one health tracking, Fasting analysis and reports, Home screen widget

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 month | $3.99 | per month |
| Gandan Premium Annual | $12.99 | per year |
| Premium User | $12.99 | one-time |


### Time to fast!

[App page](https://appshunter.io/ios/app/time-to-fast/id6470159635)

Easily monitor your intermittent fasting schedule with a visual 24-hour timeline. Adjust plans, track progress, and receive timely notifications for fasting and eating periods. Save your results and review past fasting records to stay on track with your health goals.

**Highlights:** Circular 24-hour timeline, Adjustable fasting plans, Save and edit fasting results, Past fasting records review, Fasting start/end notifications, Pre-set fasting plans

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is InterFasting free?

InterFasting is free to download, with in-app purchases available.

### Is Time to fast! free?

Time to fast! is free to download, with no in-app purchases.

### Do InterFasting or Time to fast! have ads?

InterFasting shows ads; Time to fast! does not.

### Which is updated more often, InterFasting or Time to fast!?

InterFasting ships an update every 2 days, and Time to fast! every 3 days. Most recently, InterFasting was updated on September 22, 2026 and Time to fast! on June 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*